kotlin-cesium-engine/cesium.engine/UpdateCallback

UpdateCallback

typealias UpdateCallback = (particle: Particle, dt: Double) -> Unit(source)

A function used to modify attributes of the particle at each time step. This can include force modifications, color, sizing, etc.

function applyGravity(particle, dt) {
   const position = particle.position;
   const gravityVector = Cartesian3.normalize(position, new Cartesian3());
   Cartesian3.multiplyByScalar(gravityVector, GRAVITATIONAL_CONSTANT * dt, gravityVector);
   particle.velocity = Cartesian3.add(particle.velocity, gravityVector, particle.velocity);
}
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Parameters

particle

The particle being updated.

dt

The time in seconds since the last update.

See also